1974 1.8L not holding a charge, Causes other than alternator |
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1974 1.8L not holding a charge, Causes other than alternator |
Robnxious |
Dec 3 2016, 02:40 PM
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#1
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RobnxiousOne Group: Members Posts: 184 Joined: 26-October 06 From: Sacramento Member No.: 7,097 Region Association: Northern California |
I have tried digging in on this a bit on here searching, and have seen posts saying "make sure it's the alternator before replacing". Here is what I have found so far. When the battery has a full charge, the volt reading is 12.75, and when it's running, it's about 13.5 (I remember reading on here last night that the running voltage should be about 14.5 IIRC). Which tells me it SHOULD be the alternator (that and the fact that if I run it with lights on at night, it needs charging when I get home). Also, my battery charger has an alternator check function and it said it was bad.
But, I also did the old shade tree mechanic trick of disconnecting the negative battery connection when the car was running, and it didn't miss a beat, still idled strong. I do have an alternator that I bought (yeah I know, didn't see the threads saying "make sure it's the alternator before buying" until after I had ordered it), but seeing how this is a PITA job the first time, I am hoping I can get my new baby up and running easily. Any help is appreciated, and thanks in advance |
porschetub |
Dec 4 2016, 12:43 PM
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#2
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Advanced Member Group: Members Posts: 4,704 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
13.8 is the norm,but I noticed my new regulator is marked 14.4volts??,not sure what the original ones supplied from the factory were,you would presume the same.
Surely if the OP has good battery and earth contacts (and new battery) you would think the regulator is at fault,strange that it is still making above battery voltage with no load however. I have rebuilt many altenators and played with charging systems in many cars over the years but it amazing to me some of the weird shit that can go on...... |
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